Details are pretty slim at the moment, but it appears that Vodafone, KPN and T-Mobile are among the companies that have been raided by Dutch regulators in a price-fixing investigation. The country's competition authorities, NMa, swept through the carriers' offices as part of a probe into alleged "cartel agreements" exposed by whistleblowers. All three of the companies have agreed to cooperate with the investigation and have denied wrong doing but, they're starting with a dark cloud of suspicion hanging over their heads already.